Adelbeet e



A. R. BRADSHAW.

GRADOMETER.

APPLICATION FILED SEPI. s, I9I3.

1,193,758. PanIedAug. 8,1916.

gime/who@ @MMI mi @AMW W mmw ADELBERT a. BRADSHAW, or VIsALIA, CALIFORNIA.

GRADOMETER.

Licentie.

Specification of Letters Patent.

Patented Alle'. l8 1916.

Application led September 8, 1913. Serial No. 788,572.

T 0 all ywhom 2f/11mg concern Be itgknov'vn that l, ADrLnnr R. BRAD- sHAw, a citizen ofthe `United States, residing at Visalia, in the county of Tulare and State of California, have inventedcer-v tain new and useful.Improvements in Gradometers, of which the following is a specititration.

The object of this invent-ion is to provide an instrument for attachment to the dash board or a like part of a vehicle vvhich'is capable of indicating a ,grade percentage along which the vehicle is ascending or de-4 scending, and which, in the most improved embodiment, also provides for indicating the points of compass so that the driver will not only be informed as to grade or incline but also the direction in which he is traveling.

It is one of the objects of this invention -to combine. instruments capable of giving such indications so as to facilitate the reading'thereof, irrespective of the inclination which the vehicle may assume in traveling over hilly country.

A further novel feature consists in an improved construction of a gradometer whereby the same Will indicate varying grade percentage and will automatically return to Zero when the vehicle reaches a level road bed.

Other features and objects of the invention will be more fully described-in connection Withthe accompanying drawing and will be more particularly pointed out in and'by the appended claim.

In the drawing: Figure 1, is a front elevation illustrative of one form of my invention. Fig. 2, is a sectional vievv on line 2-2 of Fig. l. Fig. 3, is a sectional vievv on line 3-3 of Fig. 1.

Like characters of reference designate similar partsthroughout the diiferent tigures of the drawing.

In the formshovvn, l have provided a casing 1, adapted to be secured to the dash board of a carriage or to any fixed part of an `automobile or like vehicle, in any desirable manner. The rear part 2, in the present construction, is adapted for such attachment.

Themargins 3, of the casing l, are bent inwardly to form a seat against which a glass-4, may be supported. WithinV the casing I mount a. dial 5, as at 6, and providea suitable spacing ring 7, between the glass and the dial to hold the same in proper spacedl relation. An vindexlS, is provided with an indicating end "9, and a counter balancing end 10, and is mounted upon an index shaft 11, in such a manner as'to'attord a vgradometer reading onthe dial The. dial 5, is preferably graduated to indicate ,grades during .descent for ascent. thereof, there being provided numerals of increasing grade indications in opposite directions from zero. rl`he index shaft 11, is journaled in a bearing 12, formed von abracket 13. A bracket 11. supports the bracket 13, and is secured at 15, to the casing 1. lAnother-'bracket 16; ismounted on the casing and journals are provided in he brackets 14; and 16, for a pendulum shaft 17. The pendulum shaft 1j?, carries a pendulum 1 8, .and the latter is rigidly mounted on said shaft. vThe index shaft 11. is operatively connected 'vvith the pendulum shaft b v means which may comprise bevel gears-19 and' 20. The bevel gear 19, is disposed between bearing 12, and bearing 21. of the index shaft 11.

The casing 1, is iixedly mountedin such a manner as to dispose the dial v5, ina substantially vertical position, and at one side of the casing 1, or to one portion of the periphery1 thereof, I xedly mount a compass casing or support which is secured to the casing 1, at Q3. A compass is indicated at 24, and may comprise a dial 25, and an index 26, of any approved construction'. The compass is providedv'ith a casing 27, which is rounded on its lovver face on a radius having its center above the compass. The compass support is provided With an upper vvallfQS, having upper and lovver faces curved concentrically with respect to the casing curvature Q7. The upper face of the wall QS. is preferably annularly grooved,

as indicated at 29, to form a race vvay 1n which anti-friction elements such as balls 30, may be disposed. The compass rests on the balls 30, so as to tilt in any direction toward the horizontal, which lwill be its normal position. rThe compass is preferably controlled by a pendulum 31, on the lstem of which a retainer 3Q, is mounted in the form of a Washer and which serves to engage the lower concentric face o-f the Wall 28, to retain the compass ZT on its anti-friction mounting but in concentric relation with the Wall 2S. lt vvill thus be seen that if the vehicle is descending a grade, the pendulum 31, will svving forwardly so as to tilt the compass into a convenient reading position with remounting of the device.

spect to theoccupant of the seat nearest the Conversely ascent of a grade would serve to tilt the pendulum rearwardly so that in either position of the vehicle, the compass face would occupy a horizontal position.

'Ihe-pendulum 1S, will always seek a vertical position irrespective of the inclination of the casing l, during an ascending or descending travel of the vehicle, and relative. movement of the casing l, With respect to the4 pendulum 18, will cause rotation of the gears and index 8, to afford a reading on the dial 5, indicating the extent of the grade incline.

It will thus be seen that I have provided in a unitary structure, two instruments having great utility when traveling in a vehicle through country regions and that the devices .are so disposed that a reading of either is always possible Without vnecessitating any discomfort on the part of the driver.

From the foregoing it is believed that the advantages and utilities of my invention will beiclear and While I have herein shown and described one specific form of my invention I do not Wish to be limited thereto except forsuch limitations as the claim may import.

I claim:

In a gradometer for vehicles,l a cylindrical casing to be rigidly attachedv to a fixed portion of the yvehicle with its central axis eX- tending in line with the direction of travel of the vehicle, a .circular dial mounted in the forward part of the casing-and provided with 4a central opening, apair of brackets mounted on the rear Wall of the casingand one of said brackets provided with an offset positioned the'end of Which is opposite the' opening of the dia l,;a second bracket carried by said offset, an index shaft mounted in the offset and the bracket carried thereby and having vits forward end extended through said dial, a pendulum shaft mount.- ed in the brackets carried 4by the casing to extend at right any les to'and adjacent the inner end of the in ex shaft, an index hand carried by the forward end of vthe index shaft to Work adjacent the dial, a pendulum carried by the pendulum shaft and depending therefrom to cause turning movement of sald shaft as the vehicle Vvaries itsinclme, a

beveled gear carried by theindex shaft, and

a second beveled gear mounted on the pendulum shaft'to mesh with said first gear to transmitmovement from the pendulum tol the index hand.

In testnnonywhereof I aflix my signature 1n presence of tivo witnesses.

ADELBERT R. BRADSHAV. Witnesses: i

L. VATSON,y n S. I. BORING. 

